Warriors utility Ben Henry has today received more encouraging news than initially expected after leaving the field with a knee injury late in Saturday's second-round NRL clash against St George Illawarra at Eden Park.

It was feared the 22-year-old had again injured the anterior cruciate ligament in his left knee, the knee he had season-ending surgery on after rupturing the ACL in a training accident last May.

However, scans have revealed he appears to have no ligament damage.

"The outlook is far more promising than we had anticipated," said Warriors doctor Simon Mayhew.

"The scans have indicated the graft ACL ligament is intact, which is great news.

"It appears Ben has a cartilage tear which would put him out for a period of weeks rather than the season."

Mayhew said Henry would be further assessed by orthopaedic surgeon Stu Walsh later in the week to confirm the full extent of the injury.

Henry's 2013 NRL campaign ended after only seven appearances.

After making a full recovery from his knee operation, he made his comeback with the club's New South Wales Cup side against Wentworthville on March 8, playing at stand-off and scoring a try.

He was brought onto the bench for Saturday's NRL clash, coming into the game in the second half and impressing until he was struck down.

In other injury news, utility Thomas Leuluai is set to return from his groin injury for the Warriors' fourth-round clash against Wests Tigers in Wellington on Saturday, March 29.